low RPM studder,pulled codes,ideas?

[SHOtime2511]

alright guys and gals,i need a little help with this one.
the other day i went to the track and ran my car.
when i started it up to leave i noticed it felt like it was missing.
when i started home,it was pretty bad,bucking under acceleration.
while i was at the track i had some ice bags on the intake manifold,
and one leaked a little down below the intake manifold.
so i thought maybe i just got some water on something and it will dry out in a day or two,so today i checked it.and it was still missing some but much less
only at low rpm 900-2000 when you revv the car slow it wont do it at all
just fast short blips and once its at like 2000K it dosent do it at all
60K done no oil in plug wells.

KOEO 59,81
nothing for KOER

 

[SHOtime2511]

bumpity

 

[SHOtime2511]

come on guys.....nothing?????

 

[revhardSHO]

59 - Low speed fuel pump circuit open (battery to ECA)

81 - '89: Insufficient IAS output voltage change when solenoid activated

from code 59 I would say you have a fuel pump issue there, although 81 might be related, not sure what it is though.

Check fuel pressure at the rail. IIRC it should be around 40psi at idle.

 

[SHOtime2511]

fuel pump was changed to a walbro 190,but ill check the pressure
seems like its just one cylinder the car still acts normal,just when you revv it
it sounds like a WRX with exhaust

 

[e_clouser]

When the ice bag leaked did it get into a plug well???? just a thought.

 

[SHOtime2511]

When the ice bag leaked did it get into a plug well???? just a thought.

it could have on the back side i cant get back there to see,but i pulled the wire off and there was no water on them